How to change the way the selection is handled in a WPF TreeView

Question

when I remove an item that is currently selected from the TreeView automatically the parent gets selected. I would like to change this behavior so the previous or the next child gets selected. I really don't know where to start ...

Any idea on how to accomplish this would be great!

Thanks.

Answer 1

You can set the SelectedItem by introducing a property such as IsSelected in your tree view node's datacontext class or model.

Assuming that you are binding a hierarchy of TreeViewItemModel class to the TreeView, you need to do the following

1. Add writeable IsSelected propertyb in TreeViewItemModel . Remember to raise property changed notification in the Setter of IsSelected .

2. Introduce this in the TreeView resources ...

    <TreeView.Resources> <Style TargetType="{x:Type TreeViewItem}"> <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" /> </Style> </TreeView.Resources> 

3. After you delete a node, set the next or previous tree view child's TreeViewItemModel objects IsSelected as true.

Let me know if this helps.

Answer 2

TreeView has Items property, which is of type ItemCollection . This type has some good events, like CollectionChanged or CurrentChanged. may be you should to spade this way?